[Amended 10-25-2010 by Ord. No. 2010-05]
The OSD Overlay District is primarily intended to:
A. Promote a detailed analysis of development parcels so as to locate
and coordinate appropriate areas for development and for conservation;
B. Avoid development that could cause inefficient patterns of development;
C. Encourage a blend of recreation areas and a mix of housing at a medium
density to serve various age groups and types of housing;
D. Provide for reasonably safe and convenient pedestrian, bicycle and
vehicle circulation, with an emphasis on connecting residential and
recreational areas;
E. Provide greater design flexibility and efficiency in the siting of
homes, services and infrastructure, including the opportunity to reduce
the length of streets and utility facilities;
F. Preserve rural characteristics through the permanent preservation
of meaningful open space and sensitive natural resources;
G. Encourage the creation of a sense of place and community spirit;
H. Promote the goals and objectives of the Lower Allen Township Comprehensive
Plan Update, 2006, as amended;
I. Make efficient use of available public water and sewer services and
other infrastructure; and
J. Avoid excessive improvement costs and future Township maintenance
costs for each new home by minimizing the amount of street and utility
length per home.
In addition to those uses permitted in the underlying zoning
district, the following uses shall be permitted by right:
A. Single-family detached dwellings.
C. Side-by-side twin dwellings.
D. Publicly owned recreation uses; recreation uses and open space owned
by a property owners association.
Refer to the requirements in the underlying zoning district.
[Amended 10-25-2010 by Ord. No. 2010-05]
A. Maximum density for a OSD shall be determined as follows:
(1)
Determine land area available for development after deleting:
existing rights-of-way of existing streets and railroads, and lands
continuously covered with water.
(2)
Multiply the resulting acreage by the following number to result
in the number of permitted dwelling units (DU) within the residential
sections of the OSD.
(a) Underlying Zoning District R-1: six.
(b) Underlying Zoning District R-2: two.
B. The densities achieved in Subsection
A may be increased by not more than two DU per acre, resulting in a maximum R-1 density of eight DU per acre and a maximum R-2 density of four DU per acre by applying the following methodology:
(1) One
bonus DU per acre if the developer provides at least 125% of the required
open space or required recreation land, or 125% of the fee in lieu
of (FILO) dedicated recreation land, if deemed acceptable per the
Subdivision and Land Development Ordinance (SALDO).
(2) Two
bonus DU per acre if the developer provides at least 150% of the required
open space or required recreation land, or 150% FILO dedicated recreation
land, if deemed acceptable per SALDO.
(3) Two
bonus DU per acre if the developer provides at least 125% of the required
open space and required recreation land, or 125% FILO dedicated recreation
land, if deemed acceptable per SALDO.
[Amended 10-25-2010 by Ord. No. 2010-05]
The overall impervious coverage for an OSD shall not exceed
40% in the R-1 District and shall not exceed 30% in the R-2 District.
Yards shall be provided as follows:
A. On a multiple frontage lot, a front yard shall be provided abutting
each street frontage.
B. For single-family detached, side-by-side twin and townhouse dwellings:
[Amended 10-25-2010 by Ord. No. 2010-05]
(1)
Minimum front yard depth: five feet.
(2)
Maximum front yard depth: 25 feet.
(3)
Minimum rear yard for principal building: 25 feet.
C. For single-family detached dwelling: minimum side yards shall total
no less than 15 feet, with no one side less than five feet, in width.
On a corner lot, two side yards shall be provided along the interior
lot lines.
D. For side-by-side twin dwellings:
(1)
One side yard shall be provided, with a minimum width of 10
feet.
E. For townhouse dwellings:
(1)
No side yard shall be required for interior units, if alley
or easement access is provided to the rear yard.
(2)
For each end unit, one side yard shall be provided, with a minimum
width of 10 feet.
F. For all other permitted uses, refer to the requirements in the underlying
zoning district.
G. An unenclosed porch, deck or patio may intrude into a required front,
side or rear yard a maximum of 50% of the required setback or 10 feet,
whichever is less.
H. Chimneys, roof overhangs, rain gutters, building footings, window
wells and similar features may intrude up to two feet into a required
setback.
I. Detached accessory buildings shall be set back a minimum of five
feet from a side or rear lot line. Accessory buildings shall not be
permitted within a front yard.